Answer: She's used 630 minutes.
Step-by-step explanation:
She has 1400 minutes.
She used 45% of them.
1. Convert 45% to decimals. You can do by dividing by 100.
2. Multiply by the total amount of minutes.
Answer:
y = 40
Step-by-step explanation:
Lets make an equation to represent the sum of the angles:
We know that the sum of angles of triangles equals 180 degrees. So based on this knowledge, the equation is :
2y + y + 10 + 50 = 180
Now we simplify:
2y + y = 3y
10 + 50 = 60
So our new equation is 3y + 60 = 180
Now all we have to do is simplify:
3y + 60 = 180
3y + 60 -60 = 180 - 60
3y = 120
3y / 3 = 120 / 3
y = 40
So the answer is 40 hope this helped
Answer:
see explanation
Step-by-step explanation:
The angle at the centre of the circle is equal to the measure of the arc that subtends it, thus
arc AB = 60°
Note that AC is the diameter of the circle, thus angle = 180°
arc BAC = arc AB + arc AC = 60° + 180° = 240°
Since the diameter is a straight angle then the third angle on AC is
180° - (32 + 60)° = 180° - 92° = 88°
arc BC = arc BE + arc EC = 32° + 88° = 120°
arc EA = arc EB + arc BA = 32° + 60° = 92°
arc ECA = arc EC + arc CA = 88° + 180° = 268°
Answer:
Explained below.
Step-by-step explanation:
A compound event is an event in which has possible outcomes more than one.
To determine the probability of compound events on has to compute the sum of the probabilities of all the individual events and, if required, remove any coinciding probabilities.
Examples of compound events are:
- The events of roll a five using a 6-sided die
.
The number of favorable outcome is rolling a 5, is 1.
The total number of outcomes of rolling a die is 6.
Then the probability of rolling a 5 is 1/6.
- The events of pulling a heart out of a standard deck of cards
The number of favorable outcome of pulling a heart is 13.
The total number of outcomes is 52.
The probability of pulling a heart from a standard deck is 13/52 or 1/4.
Thus, the procedure is to compute the sum of the probabilities of all the individual events and, if required, remove any coinciding probabilities.
I think that the most accurate one is trial 3 since it is the least incorrect and closest percent-wise to the actual correct density of the metal.
Hope this helps!